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The alert also warns of treacherous conditions for motorists at the start of the big summer getaway. Standing water and spray is likely to increase journey times and there is a risk of minor surface water flooding on some roads.

Winds could be sufficiently strong to cause some bridge restrictions, and bring down branches from trees.

Almost nine million vehicles are expected to hit the road for the start of the summer getaway as schools signal the end of term.

One of the busiest times on the roads is expected to be between 1pm and 8pm on Friday. Forecaster Hannah Findley, of The Weather Channel, added: "Low pressure will continue to dominate the weather over the British Isles on Friday, bringing plenty of cloud, rain and showers for most with winds strengthening."